Things You'll Need
Instructions
Start by deciding which cleaning solution you want to use. Any household spray cleaner should do the trick, but you can also create some cleaning solutions yourself. A bleach solution (1 part bleach to 10 parts water) or a vinegar solution (1 part distilled white vinegar to 1 part water) are effective. If your child still chews on the blocks, a vinegar solution may be best to limit your child's exposure to harsh chemicals.
Put the cleaning solution in a spray bottle and spray onto a rag, or simply pour a bit of the solution on a rag directly. Either way, put the cleaning solution on a rag instead of spraying directly onto the blocks.
Wash the wooden blocks with the rag until they appear clean, then thoroughly rinse them with warm water and allow them to air dry.